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Contract OI history

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Nov 20, 2026 EXPIRATION

ISRG $320.00 Put

ISRG261120P00320000

Latest saved OI605Oct 23, 2026
Last change-3vs previous saved observation
Saved market days7Oct 09, 2026 onwards
Daily open interest Hover a point for its date and OI
ISRG $320.00 put open interest history 7 saved observations from 2026-10-09 to 2026-10-23. Exact values and changes are listed in the table below. 6123060 2026-10-09: 601 OI2026-10-13: 612 OI2026-10-14: 612 OI2026-10-15: 611 OI2026-10-16: 611 OI2026-10-21: 608 OI2026-10-23: 605 OI Oct 09, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

ISRG contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing605-3
Oct 21, 2026608-3
Oct 16, 20266110
Oct 15, 2026611-1
Oct 14, 20266120
Oct 13, 2026612+11
Oct 09, 2026601No prior observation